digitalWrite() - Arduino Reference#

Syntax#

digitalWrite(pin, value)

Parameters#

pin: the Arduino pin number.
value: HIGH or LOW.

Returns#

Nothing

Example Code#

The code makes the digital pin 13 an OUTPUT and toggles it by alternating between HIGH and LOW at one second pace.

void setup() {
  pinMode(13, OUTPUT);    // sets the digital pin 13 as output
}

void loop() {
  digitalWrite(13, HIGH); // sets the digital pin 13 on
  delay(1000);            // waits for a second
  digitalWrite(13, LOW);  // sets the digital pin 13 off
  delay(1000);            // waits for a second
}